{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb8dadbaa59b4f8bb2113074b7f0c127650a01e767411bd21946fa8dc3c91a8e0",
    "signature": "0x401f6cf4ef2455c55d61235c768b5d8fdcc756500b7e74576e0b109465a811cf72317bd0bf0cb8886cd23e56cf03bdcfca0002c278ed74051f916d15b7cb5cdd1b",
    "signer": "0x744CD02597C29766323d08735AC416fc46b0976E",
    "userId": "708826400"
  }
}